Sluice Boxes State Park
Montana’s Hidden Limestone Canyon — Belt Creek Gorge, Abandoned Railroad Grade, Creek Swimming & Backcountry Camping in the Little Belt Mountains
Sluice Boxes State Park is a dramatic limestone canyon carved by Belt Creek through the Little Belt Mountains of central Montana, approximately 15 miles south of Belt off U.S. Highway 89. The park preserves towering limestone cliffs, precipitous ledges, and the winding creek corridor along with remnants of 19th-century mining operations, historic cabins, and the abandoned Montana Central Railroad grade — a landscape where geology, history, and wilderness intersect.
Unlike Montana’s developed campground parks, Sluice Boxes is rugged, primitive, and unmaintained — visitors hike along the old railroad grade, ford Belt Creek multiple times, swim in cold mountain pools, and camp in backcountry sites by permit. The soaring limestone walls that give the park its name (named for the sluice boxes used in placer mining) create one of the most visually striking canyon environments in Montana’s state park system. This is a park for hikers, photographers, and anglers seeking a genuine wilderness experience accessible from the Great Falls area.
Things to Do
Hiking
The park’s primary activity — rugged canyon hiking along the old railroad grade:
- Railroad grade trail: Follows the abandoned Montana Central Railroad through the limestone canyon
- Multiple creek crossings: Expect to ford Belt Creek several times — water shoes or sandals recommended
- Terrain: Uneven, rocky, and primitive — no maintained trail surface
- Note: Through-hiking is not possible — the railroad trestle at Tiger Creek is closed. Plan an out-and-back route
Swimming
Belt Creek offers natural swimming pools within the canyon — cold, clear mountain water surrounded by limestone walls. One of Montana’s most scenic wild swimming spots.
Fishing
- Belt Creek: Trout fishing in the creek — brown trout and rainbow trout
- Montana fishing license required
Photography & Nature
- Limestone cliffs: Soaring canyon walls catching golden light — photographers should plan for morning or evening visits
- Historic ruins: 19th-century mining structures and abandoned railroad infrastructure
- Wildlife: Bighorn sheep, mule deer, raptors, and songbirds
Camping
| Feature | Details |
|---|---|
| Type | Backcountry only — no developed campground |
| Permit | Backcountry Campsite Permit required (contact MT FWP Region 4, Great Falls) |
| Facilities | Vault toilet and parking at Riceville Bridge trailhead only; no water, no trash |
| Season | Year-round; sunrise to sunset at trailhead |
Best Time to Visit
| Season | Highlights | Considerations |
|---|---|---|
| Late Summer (Jul–Sep) | ⭐ BEST: Low water for creek crossings; warm swimming; longest days; wildflowers | Afternoon thunderstorms; rattlesnakes possible; bring water |
| Fall (Oct–Nov) | Cool hiking; golden cottonwoods; trout active; canyon color; quiet | Cold water; short days; creek crossings chilly |
| Spring (Apr–Jun) | Wildflowers; birding; green canyon | ⚠ HIGH WATER — creek crossings dangerous; wait for low water |
| Winter (Dec–Mar) | Ice formations on cliffs; solitude; winter photography | Cold; icy trails; creek crossings hazardous; limited daylight |
Visitor Tips
- Late summer is best: Visit in late July through September when Belt Creek is at its lowest — creek crossings are safest and swimming pools warmest. Spring runoff makes the canyon dangerous and crossings impassable.
- Water shoes essential: You will cross Belt Creek multiple times. Bring water shoes or sturdy sandals with straps — the rocky creek bed is slippery.
- No through-hike: The Tiger Creek railroad trestle is closed — plan an out-and-back hike from the Riceville Bridge trailhead. Don’t attempt to bypass the closure.
- Backcountry permit: Overnight camping requires a Backcountry Campsite Permit from Montana FWP Region 4 office in Great Falls (406-454-5840). Pack everything in, pack everything out.
- Primitive experience: The only facility is a vault toilet and parking lot at Riceville Bridge. Bring all water, food, first aid, and navigation. No cell service in the canyon.
- Great Falls proximity: Sluice Boxes is approximately 30 miles from Great Falls — making it an accessible day trip for canyon hiking and swimming.
Frequently Asked Questions
Can you swim at Sluice Boxes State Park?
Yes — Belt Creek within Sluice Boxes State Park offers natural swimming pools surrounded by towering limestone canyon walls. The water is cold and sourced from mountain snowmelt, so it is most comfortable for swimming in late July through September when water levels are lowest and temperatures warmest. There are no lifeguards, developed beaches, or facilities — this is wild, backcountry swimming. Exercise caution with water depth, current, and rocky terrain.
Do you need a permit for Sluice Boxes?
Day hiking does not require a permit. However, overnight backcountry camping at Sluice Boxes State Park requires a Backcountry Campsite Permit, which can be obtained by contacting the Montana Fish, Wildlife and Parks Region 4 office in Great Falls at 406-454-5840. There are no developed campgrounds or facilities within the park beyond a vault toilet and parking lot at the Riceville Bridge trailhead. All campers must pack in and pack out everything.
Last updated: April 2026
